Printing apparatus for moving a print carriage and writing tag information in a wireless tag on a paper sheet

1. A printing apparatus comprising: a print carriage incorporating a printhead and a communication unit configured to perform short distance wireless communication; a movement control unit configured to move said print carriage; a detection unit configured to detect, when said movement control unit moves said print carriage to cause said printhead to execute printing of print data, a wireless tag on a paper sheet using said communication unit; and a write unit configured to write tag information in the wireless tag detected by said detection unit, wherein the movement control unit moves said print carriage to scan a width corresponding to a wireless tag search range on the paper sheet before a number of wireless tags detected by said detection unit reaches a number of target wireless tags which are targets of write processing by said write unit, and moves said print carriage to scan a width corresponding to a printing range of the print data after the number of wireless tags detected by said detection unit reaches the number of target wireless tags.

2. The apparatus according to claim 1 , wherein said movement control unit moves said print carriage at a first speed before the number of wireless tags detected by said detection unit reaches the number of target wireless tags, and moves said print carriage at a second speed higher than the first speed after the number of wireless tags detected by said detection unit reaches the number of target wireless tags.

3. The apparatus according to claim 1 , further comprising a warning unit configured to give a warning if the number of wireless tags detected by said detection unit does not reach the number of target wireless tags even after moving said print carriage over the entire paper sheet.

4. The apparatus according to claim 1 , wherein upon completion of the printing, if said detection unit detects wireless tags the number of which is larger than the number of target wireless tags, information for referring to another wireless tag is written in an excessive wireless tag.

5. The apparatus according to claim 4 , wherein the information for referring to the other wireless tag includes information about a position of the other wireless tag.

6. The apparatus according to claim 1 , further comprising a holding unit configured to hold tag information which has failed to be written by said write unit, and information for specifying the wireless tag, and a unit configured to rewrite, upon completion of printing of the print data, the tag information held in said holding unit in the wireless tag specified by the information.

7. The apparatus according to claim 1 , further comprising a confirmation unit configured to, in reciprocating movement of said print carriage by said movement control unit to execute printing of the print data, confirm during backward movement whether write processing for a wireless tag which has been executed during forward movement of said print carriage has succeeded.

8. The apparatus according to claim 7 , wherein if the write processing for the wireless tag which has been performed during forward movement has failed, said confirmation unit rewrites the tag information in the wireless tag.

9. The apparatus according to claim 1 , further comprising a stop unit configured to stop power supply to said communication unit when the number of wireless tags detected by said detection unit reaches the number of target wireless tags.

10. The apparatus according to claim 1 , wherein said write unit determines whether it is possible to write tag information in the wireless tag detected by said detection unit during movement of said print carriage for one-line printing, writes, when it is determined that it is possible to write the tag information, the tag information in the detected wireless tag during the movement, and writes, when it is determined that it is impossible to write the tag information, the tag information by moving said print carriage to a position of the detected wireless tag upon completion of movement for one line.

11. The apparatus according to claim 10 , wherein the determination of whether it is possible to write the tag information is performed based on at least one of the current moving speed of said print carriage, the current position, and a set print mode.

12. The apparatus according to claim 1 , wherein upon completion of the printing, if said detection unit detects wireless tags the number of which is larger than the number of target wireless tags, tag information which has failed to be written is written in an excessive wireless tag.

13. The apparatus according to claim 1 , further comprising a unit configured to confirm, at the time of printing a reverse surface, whether processing of writing tag information in a wireless tag which has been executed by said write unit at the time of printing an obverse surface.

14. The apparatus according to claim 1 , further comprising, a paper width detection unit configured to detect a width of the paper sheet, wherein the wireless tag search range is based on the width detected by the paper width detection unit.

15. The apparatus according to claim 1 , further comprising, a reading unit configured to read an original, and to acquire a read image of the original and tag information from a wireless tag on the original, wherein said printhead executes printing of the read image acquired by the reading unit, and the write unit writes tag information acquired by the reading unit in the wireless tag detected by the detection unit.

16. The apparatus according to claim 15 , wherein the reading unit further acquires a number of wireless tags on the original, and wherein the number of target wireless tags which are targets of write processing by said write unit, is the number of wireless tags acquired by the reading unit.

17. A control method for a printing apparatus which includes a print carriage incorporating a printhead and a communication unit configured to perform short distance wireless communication, and a movement control unit configured to move the print carriage, the method comprising: a detection step of detecting, when the movement control unit moves the print carriage to cause the printhead to execute printing of print data, a wireless tag on a paper sheet using the communication unit; and a write step of writing tag information in the wireless tag detected in the detection step; wherein the movement control unit moves the print carriage to scan a width corresponding to a wireless tag search range on the paper sheet before a number of wireless tags detected in the detection step reaches a number of wireless tags which are targets of write processing in the write step, and moves the print carriage to scan a width corresponding to a printing range of the print data after the number of wireless tags detected in the detection step reaches the number of target wireless tags.

18. A non-transitory computer-readable storage medium storing a program for causing a computer to execute each step of a control method according to claim 17 .